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,~ _ 1 <br />~~ DITCH DESIGY ~IcCLA;lE C:1.lS'C:! 49=03 <br />~ Des: ':1 a .,._,_. 9a; ~1~ ,:~s~ cita ..,~~:s _. :n ta.. d.~s~gn _;ent. <br />1... '{iCC~. .,a ULI!., .i iJ f. _. .._L]~r, =.";]9141' _iOCltli'S. <br />G1ve:7; FS/'`.1~ - In __r. ?_ !l 'J C n7.~ = 1 n, r''S <br />5 1 0 r C .. i L 1 :. ~ :1 ~ ~. 3 i~ e <br />~•I a:ti l:i il71 ~elOl'1 ~ }~ Jv, - <br />DitC:. D111en51~iI:S: i!13:e = LraO~_zoldal <br />Daoth = = 7.07:1 fe„r <br />B a~ N = L = l~ : f i n <br />?tannin;; .`io. = n = 0.020 <br />.Arco of :low = .1 = bd - .d' ? - 0.3" 5v°" <br />Hyd. Radios = R =1]d + zd= .~ u _ °_d;z= - 1 ,- <br />n - 0.070 C'i <br />Velocit. ,~f flu;, = V = '_.-F7,'7 k Rc.:.- :Y g~.= <br />_ .,. ~~ FPS <br />Quantit; of Flow = 0 = .A ~ 4' 0 = 1.C9 CeS <br />DITCH DESIGN McCL.AYE CANYOV 51=53 Below Culvert <br />Design a ~~itcil to safely pass tale flows from the design event. <br />The ditch will be lined with a 2" thick layer of concrete <br />prevent erosion of the subsoil. The outlet of the channel <br />will have an energy dissipator to limit velocity of the flow. <br />Given: Event - 10 yaar '_ hour Q10 = G.30 cfs <br />Slupe of ditch = ~.~0.°d <br />Soil type = Aiiu•iial Silt Yoncolloidal <br />Maximum Velocity (fps; = 3.5 <br />Ditc11 Dimensions: Shape = Trapezoidal <br />------- Depth = d = -_ 0.131 feet <br />Base = b = 9 fast <br />Side Sl.Ipes = .. _ x.00 <br />'•lanning Yo. = n = 0.015 <br />area of flow = :1 = bd - sd' :1 = 1.11II S4 FT <br />Hyd. Radius = R =6d - ~d= .' b - 2d~z= - 1 )e.s <br />R = 0.1.17 FT <br />Velocity of flow = ': = 1.,19;'n x R° `-' K 5" s <br />V = 5.679 FP5 <br />9uantity of Flow = Q = A :K V 0 = 6.351 CFS <br />11/25/91 <br />~- <br />